kennedy onassis. >> jacqueline kennedy was instrument tall in saving grand central. pen central didn't die in vain. it sparked a movement and grand central was one of the chief beneficiaries of it. >> reporter: finally after years of neglect the term nas was restored to its original splendor. the departures showing you one minute early to give you extra time. the tiffany glass clock outside and the image of the constellations on the vast ceiling. >> it's funny. when i did the book what i discovered is it's a biography of a building. it's the people who come here, work here, earn their livings here, pass through here, and they're what this place is all about. when you stand on the balcony and look over that concourse, it is an urban ballet. >> reporter: history gives a funny perspective. 100 years ago when this building was built, "the new york times" predicted 100 million people would pass through it. we're almost there 100 years later. 82 million last year and the 100 million mark is not far away. gayle? >> bill, thank you. it's a gorgeous building. (woman) 3 days o